Ellis thayer



(Model.)

' E. THAYER.

POLISHING WHEEL.

No. 260,336. Patented Jungz', 1882.

F'IEIEn Fl Eil El WIT N EEE EE UNITED STATES PATENT OFFICE.

ELLIS THAYER, OF PAWTUCKET, RHODE ISLAND.

POLISHING-WHEEL.

SI?IECIFICA'ZLION forming part of Letters Patent No. 260,336, dated June2'7, 1882.

I Application filed June 1, 1882. (Model.)

To all whom it may concern:

Be it known that I, ELLIs THAYER., of the town of Pawtucket, in thecounty of Providence and State of Rhode Island, have invented certainnew and useful Improvements in PolishingWheels; and I do hereby declarethat the following, taken in connection with the drawings whichaccompany and form part of this specification, is a description of myinvention sufficient to enable those skilled in the art to practice it.

My invention relates to polishing-wheels as employed in nishing metallicarticles or polis'hin g other hard substances of relatively small size;

The invention consists, mainly, of two disks or clamps applied one toeach side of the polishing-wheel, and united-by a spindle formed by theunion of the shanks (one sliding into the other) with which the clampsare provided, and the novel adaptation of these devices to thepolishing-wheel, whereby great strength and durability are imparted tothe same. The

clamps, with their connectingspindle, constitute a. supplementary hub,which re-enforces the hub of the polishing-wheel around the center,where its strength has been greatly impaired by the corin g out madenecessary to insert the wire fastening at the butt of the brist-les.This device can be applied to buff-wheels and emery-wheels, and wouldconduce to their strength and durability. The clamps are indented irithe wheel and are adapted to lill the space cored out to insert thewire.

In the drawings, Figure 1 represents an edge view or the periphery of apolishing-wheel made of layers of thin cloth, Src. Fig. 2 is a .sideview, showing the metallic fasteners-'- compose the hub, and as itappears before applied to the Wheel.

Similar letters of reference indicate correspending parts.

The hub is composed of two parts, A and B,

and is a hollow cylinder with anges at each end, similar in appearanceto the ordinary spool for sewing-thread when the parts are united.

It may be made of Wood, metal, composition, or other substance suitablefor the purpose. I prefer to make it ofwood, because cheaper. A centralhole is bored longitudinally through each part. That in the part B ismade larger to receive the shank s ofthe part A, which eX- tends throughthe part B to its outer edge, the part B shooting over the shank s, andthe shank 'o forms a circumferential band between the rims or anges ofthe hub. To prevent rotation of the parts A and B between each other,they may be glued together or fastened by nails or screws. A feather orkey, d, Fig. 6, is attached to the shank o to prevent rotation of thewheel on the hub. The holein the partA is designed to receive the axle,screw, or frictional mandrel used to drive the wheel.

By. the use of my hub with bristle wheels, as represented in Fig. 5, itwill be found un-' necessary to use Wax to prevent the bristles frompushing through at the butts and to strengthen the hollow core in whichthe bristles are set. The wax so used is poured onto the Wood in aheated state, which frequently causes the wood to check or split,thereby impairing its durability. As seen in said Fig. 5, my; hub, inconjunction with the frame of bristle wheels, makes a solid continuouscore or hub and imparts great strength to the wheel. The layers ofcloth, chamois skin, &c., of which some kinds of polishing-wheels aremade have heretofore been fastened together by stitching or sewing,which, as the Wheel Wears down, are frequently cut or become brokenthrough the friction with the article polished.

My invention provides for the use of .ilexible metallic fasteners, whichmay be withdrawn and set nearer the hub from time to time, as

part A is passed through the part B until its ange meets the shank o andhugs the wheel on the side opposite B. The anges of the two parts clampthe wheel, as shown in Figs. 5 3, 4, and 5.

Havingthus described myinvention, I claim as new and desire to secure byLetters Patent- The combination of a polishing-wheel and aisupplementary hub for rre-enforcing the wheel around the core, composedof clamps indented xo in the sides of the wheel and'united ibyziJspindle formed of the Shanks ofthe clamps, which slide one into theother, substantially as described and illustrated.

ELLTS THAYER. Witnesses:

JOHN R. DOWNS,

E. N. CARTER.

